Android WebView简单使用 可以设置首页的浏览器。

主活动代码

package com.example.thinkpad.browser;

import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {
private String address;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //ActionBar actionbar=getSupportActionBar();
       /* if(actionbar!=null){
            actionbar.hide();
        }*/
        WebView webView=(WebView) findViewById(R.id.web_view);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient());
       // SharedPreferences.Editor editor=getSharedPreferences("data",0).edit();
        //SharedPreferences pref=getSharedPreferences("data",0);
        try{
            SharedPreferences pref=getSharedPreferences("data",0);//从储存数据中提取address
           address= pref.getString("address","");
        }catch (Exception e){
            e.printStackTrace();
        }
        if(address!=""){
            webView.loadUrl(address);
        }else{
            webView.loadUrl("https://www.bing.com");//设置访问网页地址。
        }

    }
    public boolean onCreateOptionsMenu(Menu menu){
        getMenuInflater().inflate(R.menu.main,menu);
        return true;
    }
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.setting:
                Intent intent=new Intent(MainActivity.this,setting.class);
                startActivity(intent);
             break;
        }
        return true;
    }
   /* protected void onActivityResult(int requestCode,int resultCode,Intent data){
        switch (requestCode){
            case 1:
                if(resultCode==1){
                    address=data.getStringExtra("address");
                }
        }
    }*/
}

设置活动代码

package com.example.thinkpad.browser;

import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import org.w3c.dom.Text;

public class setting extends AppCompatActivity {
private EditText editText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setting);
     ;
        Button button=(Button) findViewById(R.id.buton);
        button.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                editText=(EditText) findViewById(R.id.setting);
                SharedPreferences.Editor editor=getSharedPreferences("data",0).edit();
                String address=editText.getText().toString();
                editor.putString("address",address);
                editor.apply();
                finish();
            }

        });


    }

}